Anna, Beacon of Companionship

Whenever another creature enters the
battlefield under your control, you may tap Anna.
If you do, put a +1/+1 counter on both Anna and
that creature
At the beginning of your end step, if you control
three or more creatures, each player gains 3 life.
Sacrifice another creature: Creatures you control
gain protection from the color of your choice until
end of turn.